Board Thread:Pokémon Help/@comment-32228622-20170614153355/@comment-30155146-20170616172925

Ubers was smogon's banlist before the introduction of Anything Goes, which is PBB's current tier.

Ubers actually mean that, if introduced into any lower tier, they would instantly overcentalize and force people to either run mons that are normally unviable only to counter them or the mons themselves.

The reason why "Ubers" is an insult isn't because their weak, its because they are too easy to use.

Mega Gengar really only needs to be brought into something it can KO, with it's offensive typing and speed, that should be litterally "anything under it's speed tier": once it's job is done, just DBond and you instantly have a mon of your choosing removed, along with a mon that would have countered gengar, AT WORST, down.

Mega Steelix requires a lot more support to use effectively, maintaining sand and insuring that your opponent doesn't have any special coverage up his sleeve. Admittedly, even with maximum skill, it's less effective - but if you want to vary your strategy, it's a unique choice.